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The ATSB is investigating the factors that contributed toward the cracking of an engine pylon from a Boeing 747-438 aircraft, registered VH-OJT.

Numerous cracks in structural members of the pylon for the number two engine were found during routine maintenance of the aircraft.

The ATSB will obtain engineering and inspection reports, undertake material failure analysis and gather additional information from the aircraft manufacturer as part of the investigation.

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